Hydraulic vise having reservoir, pump, and cylinder carried by movable jaw



May 13, 1952 J. HELsTRoM 2,596,853

HYDRAULIC VISE HAVING RESERVOIR, PUMP, AND CYLINDER CARRIED BY MOVABLE JAW INVENTOR.

AGENT May 13, 1952 J. Hl-:LsTRoM 2,596,853

HYDRAULIC VISE HAVING ERVOIR, PUMP, AND CYLINDER CARRIED MOVABLE JAW Filed June 8, 1950 2 SHEETS-SHEET 2 INVENTOR.

AGENT Patented May 153, 1952 HYDRAULIC vIsE HAVING.'v RESERVOIR,

PUMP, AND CYLINDER CARRIED `BY MovABLE JAW Julmer Helstrom, Cook, Minn. Application June 8, 1950, Serial No. 166,827 I vThis invention relates to a vise, and has special reference to a vise having a hydraulically operated movable jaw.

One of the principal objects of the instant inventionis to provide a hydraulically operated vise in which a movable hollow jaw constitutes a fluid reservoir and carries a manually operated hydraulicpump," and in which a hollow stem on said movable jaw constitutes a guide and a movable cylinder. f

Another object is to provide a hydraulically operated movable vise jaw with air pressure operating means to facilitate the using of the vise. VVThese Aand other objects and advantages will become more apparent asthe description of the invention proceeds.

In the accompanying drawings forming a part of this application:

Fig. 1 is a vertical sectional view of my vise through one of the operating pistons.

Fig. 2 is' a vertical sectional view of a portion of the movable jaw of my vise showing the bleeder valve arrangement.

Fig. 3` is an end elevational view of my vise with parts broken away.

` FigA is a .sectional view on the line 4--4, Fig. 1.

y In the drawing, the reference numeral I indicates the base portion of my vise which carries the fixed jaw 2, the latter having an opening 3 therethrough through which the stem 4 of the movable jaw 5 extends and is reciprocated.

As shown in the drawing, the movable jaw 5 is hollow as at 6 and serves as the reservoir for the hydraulic uid 1 used for the operation of the vise, the jaw 5 having an inner wall 8, a bottom wal1`9, and an outer wall I0 which curves inwardly to meet the inner wall at the working face of the jaw, as shown, and these walls form the hollow reservoir 6. An auxiliary wall II is mounted within the reservoir 6 and is spaced from the inner wall 8 to form a passage I2.

The outer wall I0 is preferably cut away as at I3 forming an opening into the reservoir to permit work to be done on the interior thereof, as on the auxiliary wall I I, and a plate I4 is preferably' secured over the cut away portion to close the latter and form a part of the outer wall. Stud bolts I5 may be used to secure the plate I4A in place.

The auxiliary wall II is drilled and threaded as at I6 to receive one end of a hydraulic pump fitting, the tting comprising a housing I1 having a bore I8 in which a piston I9 is reciprocated to pump hydraulic liuid. The opposite endof the housing I1 is threaded and extends through an 1 Claim. (Cl. SI1-17.2)

opening 20 in the plate I4.so that a nut 2| may be mounted thereonv to vprovide a solid mounting for the hydraulic pumping mechanism. A stuifing nut 22 is preferably provided to insure'the pistons beingv operative in a tight cylinder.

'A hydraulic uid intake' port 23 is provided on the housing I1 and leads into the cylinder I8. Afball valve 24 is provided for automatic opening and closing of the intake port 23 as the piston I9 is operated.

An outlet orpressure port 25 is provided from the cylinder and a'ball valve 26 is-mounted on a suitable seat, as shown, to close the port when the piston is pulled outwardly in the cylinder I8, a spring 21 being provided to bias the ball 26 towards closing the outlet or port 25.- The function and operation of the piston and valves 24 and 26 vis deemed quite obvious to those skilled in the art, the lever 2'8 being provided to reciprocate the piston or plunger I9, there being an arm 29 extending from the outer `wall of the movable jaw on which a link 30 is pivotally mounted as at 3|, the opposite end of the link 30 being slidably and pivotally connected tothe outer end of the piston as at 32. The elongated opening in the link to permit the sliding pivot is indicated at33. I

It is deemed apparent that the level of the Huid 1 in the reservoir 6 must be above the level of the ports 23 and 25 for proper operation, and it may readily be seen that the operation of the lever 28 will force iiuid under pressure out of the port 25 past the valve 26 and into the passage I2.

To operate my vise jaw hydraulically, I have provided a hollow cylinder 34 in the stem 4 of the movable jaw 5, the cylinder being bored from the outer end of the stem and the bore being closed by a threaded plug 35 after the device is assembled. The under side of the stem 4 is provided with a longitudinal slot 36 through which a bumper or stop 31 extends, the stop 31 being fixed to the base I, and the slot being of sufficient' length to permit the stem to reciprocate the desired distance to open and close the jaw of the vise.

Within the cylinder 34, a bumper piston 38 is carried with one end abutting the stop 31 as shown, the piston being of a length to extend beyond the limits of the slot 36, of course. The opposite end of the piston 38 is provided with a seal 39, held in place, preferably, by a bolt 40 and cap 4I, and this seal serves to permit fluid pressure to be built up between the end of the bumper piston 38 and the closed end of the bore 35 s0 3 that said pressure will move the jaw 5 towards the fixed jaw 2.

Pressure is built up in the bore 35 by means of a fluid passage 42 through the stem 4 from the outer end of the bore to and through the inner wall 8 of the jaw 5, as shown, to communicate with the passage I2. Thus, it will be seen that the operation of the lever 28 will move the jaw 5 toward the xed jaw 2.

I have provided automatic means to open the jaws of my vise. This means comprises a pair of suitable contractile springs 43-43' which are secured between the outer end 44 of the stem 4 and the base i to constantly bias the jaws toward openposition. It is deemed apparent that when no fluid pressure is present in the bore 35, the springs 43 and 43' will move the jaw 5 away from the jaw 2.

A pressure relief valve operating screw 45 is provided to release the yfluid pressure to permit the jaws to open, the relief valve comprising a housing 46 threadedly installed in a manner similar to the installation of the hydraulic pump housing i1, as shown, the housing having a relief port 41 communicating with the channel i2. A needle valve 48 is provided on the inner end of the voperating screw 45 for closing and opening the port 41 to allow pressure to leak ou of the pressure system and pass back into the fluid reservoir 6 through the outlet ports 49,-thus Dermbting the jaws to open freely. Obviously, a packing nut 50 is provided for the relief valve.

It is deemed apparent that the speed of the opening of the jaws may be controlled by means of the relief valve operating screw 45.

desired, a second hydraulic pump mechanlsm, in addition to that already described. and having a vSmaller diameter piston 5 l. may be provided on the jaw 5, the second pump being op.- erated, in the same manner as the rst and having a, similar lever and link, not shown, and a supe plting arm 52 being provided for said lever and link. Ihe smaller diameter piston will permit greater closing stress to be applied to the jaws, while the larger piston will move the jaws together faster.

Another novel feature of my invention is the provision for closing the jaws of the vise by means of air pressure. An air valve 53 is mounted on the movable jaw 5 above the uid level line, and communicates with the reservoir 6 so that a common air pressure line valve may be connected to the valve 53 to force air into the reservoir 6. This air pressure in the reservoir will press against the fluid, obviously. and force same through the ports 23 and 25 to build up pressure in the bore 35 to close the jaws of the vice. For quick operation, the air valve functions admirably, although the closing stress applied to the jaws is limited to the available air pressure. However, the hydraulic pumps may be operated to apply further stress if desired.

An air release valve 54 is provided to relieve the air pressure within the reservoir 6 so that the t vise jaws may be moved away from each other.

Having thus described my invention, what I claim is:

As a new article of manufacture a vise consisting of a lixed jaw, a movable jaw. a stem eX- tending from said movable jaw through said xed jaw, said movable jaw beinghollow to provide a fluid reservoir, a hydraulic pump installed in said reservoir below the level of fluid therein, means on said movable jaw for operating said pump, said stem having a bore within same. said bore having its outermost end closed, a bumper piston in said bore, a stop for said piston, said stop being secured to said xed jaw, said'stem having a slot therein adjacent, the inner end thereof to receive said stop, and a channel in said stem connecting said pump with the outermost end of said bore for applyingVV fluid pressure between saidvclosed end of said bore and said piston therein to move said movable jaw towards said vfixed jaw.

JULMER REFERENCES CITEDy The following references are of record in the file of this pabent UNITED STATES PATENTS u Number Name Y Date 1,667,759 White ,......L.'.. May 1, 1928 2,107,970 Wells Feb. 8, 1938 2,200,392` 

